Process for treating animal fibers



Patented June 28,1932

UNITED STATES PATENT F RICHARD FEIBELMANN, or nADEBEULnREsnEN, sums, ASSIGNOR 'ro. crimiscnn FABRIK VON HEYDENLA. c+., or RADEBEUL, Nmn-nnnsnrm, GERMANY, a conro- RATION' 0F GERMANY A rnocnss roa rnmrme' Airman rranns This invention relates to processes for treatinganimal fibers and particularly relates to a 1 im ortance.

process for treating animal fiber, such as wool, or silk, with less dangerous materials than the sulfuric acid used up to now in thevarious processes for improving the said fibers. Processes of the nature coming here in consideration are particularly the carboni zation and dyeing processes. The carbonization is only carried out with wool, but caii'be combined with the dyein of wool as well. As to silk the invention pays only a part of The car onization of wool is nowuniversalthe dyein of the same.

1y eitected by treating the wool with sulfuric I acid. Wool may be carbonized either before or after dyeing and in either case the deleterious effect of the sulfuric acid is of great have now found that the wool-is very much improved if I treat it instead of with sulfuric acid, with sulfonic acids of, the aromatic hydrocarbons, such as'for instance ptoluenesulfon'icv acid, naphthalene-sulfomc 3 acids. Though these latter-acids are strong.

they affect the wood fibers very much less than sulfuric acid, and furthermore they develop a high capacity of wetting out-wool so as to c renderthe much recommended application of V wetting out agent-s superfluous.

the vegetable impurities contained in the Wool, but show very little, if any effect on the wool fiber-and inasmuch as they are capable of thorou' 'hly wetting out the wool, it is even-' 1y carbonized all over withoutgiving rise to the much dreaded'acid spots".

toluene-sulfonic acid.

A During the carbonization 'the relatively strong sulfonic acids advantageously destroy No Drawing. Application filed October 25, 1928 Serial No. 815,108, and. in Germany February 11, 1928,

tion of sulfonic acids is very advantageous for the' dyeing of wool in acid baths, whereby the use of wetting out agents can be dispensed with. p

The introduction of the organic sulfonic acids into the industry of enhancing wool ofi'ers therefore, as is seen from the above, conslderable advantages. 4

For the better understanding of my newinvention I shall cite various examples of how I proceedto carry the same into effect.

Example 1. Oarbom'aatz'on of wool removed" mechanically. The after treat-- ment of the wool is as usual. Instead of ptoluenesulfonic acid I may applynaphthalene-sulfonic (a or ,8), or naphthalene-disulfonic or, the like economicallypossible sul-v fonic acids.

furic acid is, darker than 'such treated wit Ewample II. Dyeinyof'wool, Y Y *I prepare a solution containipg 10% of fonic acid, dissolve therein: an aciddye, suit able for W001, and proceed then as usual. In the dye baths for the 1 dyeing of silk the acids usually applied may be advantageously substituted by organic sulfonic acids. Sodium sulfate is added as a levelling agent, since this substance appears to have as 'ght solvent action on the (1 e-taken up by'the fiber, thus removing it rom those places in which it may have been deposited in excess.

' What I claim is Wool treated analogously with '"a' 5% sul-. 15"

sodium sulfate and of 5 %",8-naplithalene,-sul-- so 1. The process for the carbonization of raw Wool containing vegetable impurities,

said process consisting in soaking the raw wool in an aqueous solution of an aromatic sulfonic acid, drying the Wool, and exposing it to an elevated temperature.

2. The process for the carbonization of raw wool containing vegetable impurities, said process consisting in soaking the raw Wool in an aqueous solution of p-toluenesulfonic acid, drying the Wool, and exposing it to an elevated temperature.

In witness whereof, I have hereunto set In hand.

y RICHARD FEIBELMANN. 

